package com.xuecheng.content.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.xuecheng.base.execption.XueChengPlusException;
import com.xuecheng.base.model.PageParams;
import com.xuecheng.base.model.PageResult;
import com.xuecheng.content.mapper.*;
import com.xuecheng.content.model.dto.AddCourseDto;
import com.xuecheng.content.model.dto.CourseBaseInfoDto;
import com.xuecheng.content.model.dto.EditCourseDto;
import com.xuecheng.content.model.dto.QueryCourseParamsDto;
import com.xuecheng.content.model.po.*;
import com.xuecheng.content.service.CourseBaseInfoService;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
import java.util.List;

/**
 * @Description 课程信息管理业务接口实现类
 * @Author dingchunlin
 * @Date 2024/3/29 14:07
 * @Version 1.0.0
 */
@Service
public class CourseBaseInfoServiceImpl implements CourseBaseInfoService {

    @Autowired
    CourseBaseMapper courseBaseMapper;

    @Autowired
    CourseMarketMapper courseMarketMapper;

    @Autowired
    CourseCategoryMapper courseCategoryMapper;

    @Autowired
    TeachplanMapper teachplanMapper;

    @Autowired
    TeachplanMediaMapper teachplanMediaMapper;

    @Autowired
    CourseTeacherMapper courseTeacherMapper;


    /**
     * 课程分页查询
     *
     * @param pageParams
     * @param queryCourseParamsDto
     * @return
     */
    @Override
    @Transactional
    public PageResult<CourseBase> queryCourseBaseList(PageParams pageParams, QueryCourseParamsDto queryCourseParamsDto) {
        //查询条件
        LambdaQueryWrapper<CourseBase> queryWrapper = new LambdaQueryWrapper<>();
        //构建查询条件，根据课程名称查询
        queryWrapper.like(StringUtils.isNotEmpty(queryCourseParamsDto.getCourseName()), CourseBase::getName, queryCourseParamsDto.getCourseName());
        //构建查询条件，根据课程审核状态查询
        queryWrapper.eq(StringUtils.isNotEmpty(queryCourseParamsDto.getAuditStatus()), CourseBase::getAuditStatus, queryCourseParamsDto.getAuditStatus());
        //构建查询条件，根据课程发布状态查询
        queryWrapper.eq(StringUtils.isNotEmpty(queryCourseParamsDto.getPublishStatus()), CourseBase::getStatus, queryCourseParamsDto.getPublishStatus());
        //分页对象
        Page<CourseBase> page = new Page<>(pageParams.getPageNo(), pageParams.getPageSize());
        // 查询数据内容获得结果
        Page<CourseBase> pageResult = courseBaseMapper.selectPage(page, queryWrapper);
        // 获取数据列表
        List<CourseBase> list = pageResult.getRecords();
        // 获取数据总数
        long total = pageResult.getTotal();
        // 构建结果集
        PageResult<CourseBase> courseBasePageResult = new PageResult<>(list, total, pageParams.getPageNo(), pageParams.getPageSize());
        return courseBasePageResult;
    }

    @Transactional
    @Override
    public CourseBaseInfoDto createCourseBase(Long companyId, AddCourseDto dto) {
        //新增对象
        CourseBase courseBaseNew = new CourseBase();
        //将填写的课程信息赋值给新增对象
        BeanUtils.copyProperties(dto, courseBaseNew);
        //设置审核状态
        courseBaseNew.setAuditStatus("202002");
        //设置发布状态
        courseBaseNew.setStatus("203001");
        //机构id
        courseBaseNew.setCompanyId(companyId);
        //添加时间
        courseBaseNew.setCreateDate(LocalDateTime.now());
        //插入课程基本信息表
        int insert = courseBaseMapper.insert(courseBaseNew);
        if (insert <= 0) {
            throw new XueChengPlusException("新增课程基本信息失败");
        }
        //向课程营销表保存课程营销信息
        CourseMarket courseMarket = new CourseMarket();
        BeanUtils.copyProperties(dto, courseMarket);
        //设置课程id
        Long courseId = courseBaseNew.getId();
        courseMarket.setId(courseId);
        saveCourseMarket(courseMarket);
        //查询课程基本信息及营销信息并返回
        return getCourseBaseInfo(courseId);
    }

    //保存课程营销信息
    private int saveCourseMarket(CourseMarket courseMarketNew) {
        //收费规则
        String charge = courseMarketNew.getCharge();
        if (StringUtils.isBlank(charge)) {
            throw new XueChengPlusException("收费规则没有选择");
        }
        //收费规则为收费
        if (charge.equals("201001")) {
            if (courseMarketNew.getPrice() == null || courseMarketNew.getPrice().floatValue() <= 0) {
                throw new XueChengPlusException("课程为收费价格不能为空且必须大于0");
            }
        }
        //根据id从课程营销表查询
        CourseMarket courseMarketObj = courseMarketMapper.selectById(courseMarketNew.getId());
        if (courseMarketObj == null) {
            return courseMarketMapper.insert(courseMarketNew);
        } else {
            BeanUtils.copyProperties(courseMarketNew, courseMarketObj);
            courseMarketObj.setId(courseMarketNew.getId());
            return courseMarketMapper.updateById(courseMarketObj);
        }
    }

    //根据课程id查询课程基本信息，包括基本信息和营销信息
    @Override
    public CourseBaseInfoDto getCourseBaseInfo(long courseId) {

        CourseBase courseBase = courseBaseMapper.selectById(courseId);
        if (courseBase == null) {
            return null;
        }
        CourseMarket courseMarket = courseMarketMapper.selectById(courseId);
        CourseBaseInfoDto courseBaseInfoDto = new CourseBaseInfoDto();
        BeanUtils.copyProperties(courseBase, courseBaseInfoDto);
        if (courseMarket != null) {
            BeanUtils.copyProperties(courseMarket, courseBaseInfoDto);
        }

        //查询分类名称
        CourseCategory courseCategoryBySt = courseCategoryMapper.selectById(courseBase.getSt());
        courseBaseInfoDto.setStName(courseCategoryBySt.getName());
        CourseCategory courseCategoryByMt = courseCategoryMapper.selectById(courseBase.getMt());
        courseBaseInfoDto.setMtName(courseCategoryByMt.getName());
        return courseBaseInfoDto;
    }


    @Transactional
    @Override
    public CourseBaseInfoDto updateCourseBase(Long companyId, EditCourseDto dto) {
        //课程id
        Long courseId = dto.getId();
        CourseBase courseBase = courseBaseMapper.selectById(courseId);
        if (courseBase == null) {
            XueChengPlusException.cast("课程不存在");
        }
        //校验本机构只能修改本机构的课程
        if (!courseBase.getCompanyId().equals(companyId)) {
            XueChengPlusException.cast("本机构只能修改本机构的课程");
        }
        //封装基本信息的数据
        BeanUtils.copyProperties(dto, courseBase);
        courseBase.setChangeDate(LocalDateTime.now());
        //更新课程基本信息
        int i = courseBaseMapper.updateById(courseBase);
        //封装营销信息的数据
        CourseMarket courseMarket = new CourseMarket();
        BeanUtils.copyProperties(dto, courseMarket);
        saveCourseMarket(courseMarket);
        //查询课程信息
        CourseBaseInfoDto courseBaseInfo = this.getCourseBaseInfo(courseId);
        return courseBaseInfo;

    }

    /**
     * 删除课程信息
     *
     * @param courseId
     */
    @Override
    @Transactional(rollbackFor = Exception.class)
    public void deleteCourseBase(Long courseId) {
        //首先查询出课程的基本信息
        CourseBase courseBase = courseBaseMapper.selectById(courseId);
        String status = courseBase.getAuditStatus();
        //只有当课程审核状态为未提交的时候才能删除--202002
        if (status.equals("202002")) {
            //删除课程需要删除课程相关的基本信息、营销信息、课程计划、课程教师信息
            //1.1首先删除课程基本信息
            LambdaQueryWrapper<CourseBase> baseLambdaQueryWrapper = new LambdaQueryWrapper<>();
            baseLambdaQueryWrapper.eq(CourseBase::getId, courseId);
            courseBaseMapper.delete(baseLambdaQueryWrapper);
            //1.2删除营销计划
            LambdaQueryWrapper<CourseMarket> courseMarketLambdaQueryWrapper = new LambdaQueryWrapper<>();
            courseMarketLambdaQueryWrapper.eq(CourseMarket::getId, courseId);
            courseMarketMapper.delete(courseMarketLambdaQueryWrapper);
            //1.3删除课程计划
            LambdaQueryWrapper<Teachplan> teachplanLambdaQueryWrapper = new LambdaQueryWrapper<>();
            teachplanLambdaQueryWrapper.eq(Teachplan::getCourseId, courseId);
            teachplanMapper.delete(teachplanLambdaQueryWrapper);
            LambdaQueryWrapper<TeachplanMedia> teachplanMediaLambdaQueryWrapper = new LambdaQueryWrapper<>();
            teachplanMediaLambdaQueryWrapper.eq(TeachplanMedia::getCourseId, courseId);
            teachplanMediaMapper.delete(teachplanMediaLambdaQueryWrapper);
            //1.4删除课程教师信息
            LambdaQueryWrapper<CourseTeacher> courseTeacherLambdaQueryWrapper = new LambdaQueryWrapper<>();
            courseTeacherLambdaQueryWrapper.eq(CourseTeacher::getCourseId, courseId);
            courseTeacherMapper.delete(courseTeacherLambdaQueryWrapper);
        }else {
            throw new XueChengPlusException("此课程暂时不能被删除");
        }
    }


}
